replace

#!/bin/bash

# replace string in file (sed pattern)

# @example
# replace "exit 0" with "# exit 0" in /etc/rc.local
# RPI_REPLACE_PATTERN="exit 0/# exit 0"
# RPI_REPLACE_FILE="${RPI_ROOT}/etc/rc.local"

to_array RPI_REPLACE_PATTERN
to_array RPI_REPLACE_FILE


function rpi_replace_prerun() {
    [[ -n "${RPI_REPLACE_PATTERN}" ]] || error "RPI_REPLACE_PATTERN"
    [[ -n "${RPI_REPLACE_FILE}" ]] || error "RPI_REPLACE_FILE is not set."
}

function rpi_replace_run() {
    local file
    local pattern
    local i
    i=0
    for file in "${RPI_REPLACE_FILE[@]}" ; do
        pattern="${RPI_REPLACE_PATTERN["${i}"]}"
        file="${RPI_REPLACE_FILE["${i}"]}"
        rpi_replace_string_in_file "${pattern}" "${file}"
        i+=1
    done
}

function rpi_replace_description() {
    echo "replace string in file (sed pattern \"s/.../g\")"
}

function rpi_replace_help_params() {
    help_param "RPI_REPLACE_FILE" "file to search & replace pattern in"
    help_param "RPI_REPLACE_PATTERN" "sed pattern to match (and replace)"
}

# ---------------------------------------------------------------------
function rpi_replace_string_in_file() {
    local pattern="$1"
    local file="$2"
    { [[ -n "${pattern}" ]] && [[ -n "${file}" ]]; } || error "missing arguments. replace line"
    sudo sed -E "s/${pattern}/g" -i "${file}" || error "replace_string ${pattern} ${file}"
}